the USB programmable 123\TUNE-4-R-V-B21-B23 is designed for the Volvo B17, B19, B21, B23 and B230 engines, not only for classic cars like the Volvo 242, 244, 245 etc but also for the trucks and boats ( Volvo Penta ) .
If you want to tune your engine, or you have an engine for which there is no standard distributor available….. And you are a Windows PC user, the 123\TUNE is the answer! By connecting it to a computer, you can easily adapt the 123\TUNE to fulfill even the most demanding requirements. The unit offers two sets of curves that can be selected by placing 12 Volt on a wire from the 123\TUNE. Handy, if you’re driving on two different fuels, like regular fuel with LPG or with Ethanol